JP2870513B2 - A method of aligning the core of a steel column with the foundation concrete - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically and easily matching a core of a steel column to a core of a foundation concrete in a steel frame construction work of a building.

[0002]

SUMMARY OF THE INVENTION In the steel frame construction work of a steel frame building, when a steel column is vertically installed on the foundation concrete, the work of aligning the so-called core of the steel column with the core of the foundation concrete. Conventionally, as shown in FIG. 2, the bolt holes E of the base plate D of the steel column C inserted into the anchor bolts B embedded in the foundation concrete A are made to have four holes around the diameter of the anchor bolts B, respectively. Provide a legal play when inserting the bolt into the bolt slightly open, first, the base plate D with the bolt hole inserted into the anchor bolt, the mortar lump placed on the center of the upper surface of the foundation concrete A, that is, mortar Manju F
, And move the base plate horizontally while moving it according to the inclination of four turns around the mortar steamed bun F,
Before adjusting the height and lateral displacement with jacks and ropes, take the core of the steel column, position and fix it with the upper and lower fixing nuts G, adjust the gap with the foundation concrete with the play of the hole and align the core I was working. This previous work required considerable skill and time to determine the accuracy, and the total error of the deviation was considerable.

An object of the present invention is to simply and easily adjust the height position with a positioning nut, and to easily and accurately align a core with a foundation concrete only by its own weight of a steel column. is there.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a method of constructing a steel frame by constructing a steel pillar C on a cored foundation concrete A, and a bolt hole E formed in a base plate D. A counterbore seat portion 1 is provided at the periphery of the rear surface of the anchor bolt B with a diameter slightly larger than the diameter of the anchor bolt B, and a cone nut 3 having a conical portion 2 formed on the upper surface of the nut is attached to each anchor bolt B. The screw is screwed to the adjusted position, the bolt hole E of the base plate D is inserted, and the counterbore seat portion 1 of the bolt hole E is brought into surface contact with the conical surface of the conical portion 2 of the conical nut 3 to fix the fixing nut 5. The base plate D is fixed in place and the lateral displacement is automatically adjusted by the weight of the steel column at the conical surface of the conical portion 2 and the contact surface of the counterbore seat portion 1, and the core is accurately and easily adjusted to the core of the foundation concrete. Construction method It is obtained by the butterfly.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the steel frame construction method according to the present invention, the core of the steel column C to be built is automatically set to the core of the anchor bolt B implanted in the conventional foundation concrete A. It is a construction method that can solidify the foundation accurately, and a counterbore seat portion 1 is provided on the periphery of the back surface of each bolt hole E drilled slightly larger than the diameter of the anchor bolt B on the base plate D of the steel column C. Then, a conical nut 3 having a conical portion 2 formed on the upper surface of the nut is screwed and fixed at a position where the height position is adjusted with a lock nut 4, and then, from above each of these anchor bolts B, the base plate D When the bolt hole E is inserted, the conical surface of the conical portion 2 of the conical nut 3 positioned and fixed to the anchor bolt B,
The surface of the counterbore sheet 1 of the base plate D makes surface contact in a male and female state. Then, by the mutual contact between the conical contact surfaces, the deviation of the center line is automatically adjusted by the weight of the steel column, and the center lines can be accurately adjusted. Then, a normal fixing nut 5 is screwed and tightened from above the base plate D and is prevented from rotating with the stop nut 6, so that the core of the steel column can be easily and accurately adjusted to the core of the foundation concrete. It is. Therefore, the basic concrete through core alignment of steel columns in steel frame construction work,
As before, there is no need to perform any manual work before setting up the alignment of the jack and the rope with mortar steamed buns by hand, and the precision of the alignment is accurate and the construction period can be remarkably reduced without any skill.

The counterbore seat portion 1 formed on the back surface of the bolt hole E of the base plate D is formed directly on the base plate. Instead of processing the counterbore sheet on the bolt hole, the spot facing sheet 1 is formed around the back surface of the bolt hole. Similar effects can be obtained by welding the valve seat 7 as shown in FIG.

[0007]

According to the present invention, in steel frame construction work,
Conventionally, the core alignment between the base concrete and the base plate of a steel column, which required the labor and skill required by mortar steamed buns, was bolted to the base nut on a conical nut that was screwed to the anchor bolt of the base concrete and positioned at a height. Just by inserting and mounting the holes, it is possible to easily and accurately align the center of the steel column by its own weight, and the conventional mortar bun does not require the conventional preparatory work.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a configuration according to the present invention method.

FIG. 2 is a cross-sectional view showing a conventional method.

FIG. 3 is a sectional view of a main part of another embodiment of the method of the present invention.

[Explanation of symbols]

 1 Counterbore Seat 2 Conical Part 3 Conical Nut 4 Stop Nut 5 Fixing Nut 6 Stop Nut 7 Valve Seat A Foundation Concrete B Anchor Bolt C Steel Column D Base Plate E Bolt Hole F Mortar Manju G Fixing Nut

Claims (1)

(57) [Claims] The present invention relates to a steel-frame construction method for steel-frame columns to be laid on a cored foundation concrete in steel-frame construction work.
The diameter of the bolt hole formed in the base plate is slightly larger than the diameter of the anchor bolt, and a counterbore seat portion 1 is provided on the peripheral edge of the back surface, and each anchor bolt has a conical nut 3 having a conical portion 2 formed on a nut upper surface. Then, the screw is screwed to the position where the height position is adjusted by the lock nut 4, the bolt hole of the base plate is inserted, and the counterbore seat portion 1 of the bolt hole is brought into surface contact with the conical surface of the conical portion 2 of the conical nut 3. Then, the base plate is fixed with the fixing nut 5 and the lateral displacement is automatically adjusted by the weight of the steel column at the contact surface between the conical surface and the counterbore seat portion 1 so that the core is aligned with the core of the foundation concrete. A method of aligning the core of a steel column with the foundation concrete that has been made.